The 2005 Montana SV6 is a 4-door, up to 7-passenger mini van, available in 4 trims, ranging from the Extended Wheelbase FWD 1SA to the Extended Wheelbase AWD 1SB.

Upon introduction, the Extended Wheelbase FWD 1SA is equipped with a standard 3.5-liter, V6, 200-horsepower engine that achieves 18-mpg
in the city and 24-mpg on the highway. The Extended Wheelbase AWD 1SB is equipped with a standard 3.5-liter, V6, 200-horsepower engine that achieves 17-mpg in the city and 23-mpg on the highway. A 4-speed automatic transmission with overdrive is standard on both trims.